And all those accounts are far less impressive. It's easy to win when you have an advantage over your enemy. Beating someone better equipped than you is always cooler, because it's an indicator of skill, and any martial artist of note in history has done this.
That's why it's important to know Liechtenauer had techniques to beat a heavily armored opponent. That's why it's important to know Musashi would duel guys using only a wooden sword. A good martial artist should be able to defeat any opponent regardless of differences in equipment or technique. A poor martial artist relies on a piece of equipment or special technique.